"We were children," he said of his relationship with the "Shake It Off" singer. "We were 18, 19. Young enough."

While Jonas got close with these three stars, he disclosed that while touring with Britney Spears in 2011, she kept her distance. "It's funny because technically you're not supposed to get too close to Britney," he admitted. "Even though you are on tour with her they still ask you to keep a comfortable distance."